replace duplicates: process chained constructors (IDEA-138745)

java/java-impl/src/com/intellij/refactoring/util/duplicates/MethodDuplicatesMatchProvider.java

@@ -58,8 +58,9 @@ class MethodDuplicatesMatchProvider implements MatchProvider {
     final boolean needQualifier = match.getInstanceExpression() != null;
     final boolean needStaticQualifier = isExternal(match);
     final boolean nameConflicts = nameConflicts(match);
+    final String methodName = myMethod.isConstructor() ? "this" : myMethod.getName();
     @NonNls final String text = needQualifier || needStaticQualifier || nameConflicts
-                                ?  "q." + myMethod.getName() + "()": myMethod.getName() + "()";
+                                ?  "q." + methodName + "()": methodName + "()";
     PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)factory.createExpressionFromText(text, null);
     methodCallExpression = (PsiMethodCallExpression)CodeStyleManager.getInstance(myMethod.getManager()).reformat(methodCallExpression);
     final PsiParameter[] parameters = myMethod.getParameterList().getParameters();

java/java-tests/testData/refactoring/introduceParameter/afterCodeDuplicatesFromConstructor.java

@@ -0,0 +1,13 @@
+class A {
+  public A(String a) {
+  }
+}
+
+class B extends A {
+  public B(String a) {
+      this(a, null);
+  }
+  public B(String a, final String anObject) {
+    super(a);
+  }
+}

java/java-tests/testData/refactoring/introduceParameter/beforeCodeDuplicatesFromConstructor.java

@@ -0,0 +1,14 @@
+class A {
+  public A(String a) {
+  }
+}
+
+class B extends A {
+  public B(String a) {
+    super(a);
+  }
+  public B(String a) {
+    super(a);
+    String <caret>b = "b";
+  }
+}

java/java-tests/testSrc/com/intellij/refactoring/IntroduceParameterTest.java

@@ -341,6 +341,12 @@ public class IntroduceParameterTest extends LightRefactoringTestCase  {
     checkResultByFile("/refactoring/introduceParameter/after" + getTestName(false) + ".java");
   }
 
+  public void testCodeDuplicatesFromConstructor() {
+    configureByFile("/refactoring/introduceParameter/before" + getTestName(false) + ".java");
+    perform(true, 0, "anObject", false, true, true, false, 0, true);
+    checkResultByFile("/refactoring/introduceParameter/after" + getTestName(false) + ".java");
+  }
+
   public void testTypeAnnotation() {
     doTest(IntroduceParameterRefactoring.REPLACE_FIELDS_WITH_GETTERS_NONE, false, false, false, false);
   }